A) amplitude\[A/2,\]frequency\[2n\]and wavelength \[\lambda \]
B) amplitude\[A/2,\]frequency\[2n\]and wavelength\[\lambda /2\]
C) amplitude A, frequency \[n\]and wavelength
D) amplitude A, frequency\[2n\]and wavelength \[2\lambda \]
Correct Answer: B
Solution :
\[f=\frac{n}{T}=\frac{8}{T}\] velocity attain by plate to fall 10 cm. \[\upsilon =\sqrt{2gh}\] \[=\sqrt{2\times 10\times 0.1}\] \[=\sqrt{2}\,cm/sec.\] Time taken to reach 10 cm. \[\upsilon =u+gt\] \[\sqrt{2}=10t\] \[\Rightarrow \,t=\frac{\sqrt{2}}{10}\sec \] \[f=\frac{8\times 10}{\sqrt{2}}=56.73\,Hz.\]
You need to login to perform this action.
You will be redirected in
3 sec
